About the flag

It is a quite typical portuguese municipal flag,
with the coat of arms centred on a gyronny background
(city rank) of red and
yellow. This is the flag in use since after the upgrading of the
municipality seat to city status, in 1988.02.01, dully confirmed (for there
were no significant changes) by CHAAP in 1999.04.19.António Martins-Tuválkin, 06 Jan 2007

Version without the coat of arms

Previous flag

image by Sérgio Horta, 6 Jan 2007

Before the upgrading of the municipality seat to city status, in
1988.02.01, the mural crown had only four towers and the flag was
quarterly (town rank).
This flag and arms were adopted and published in the official journal
Diário do Governo : I
Série in 1935.04.08.António Martins-Tuválkin, 6 Jan 2007